Listal is a social networking member based platform for sharing lists and ratings. Member listings and ratings allow other members to get recommendations and find other listal members.

The StumbleUpon service is a bookmark and social networking framework that suggests new sites you may be interested in seeing based on your interest and the interests of other StumbleUpon users.

BlinkList is an excellent online social bookmarking management tool as it allows users to bookmark pages, add tags, and share bookmarks with the BlinkList community.